AD7456

www.DataSheet4U.com PRELIMINARY TECHNICAL DATA a Preliminary Technical Data FEATURES Specified for VDD of 3 V and 5 V Very Low Power: TBD mW typ at 100kSPS with 3 V Supplies TBD mW typ at 100kSPS with 5 V Supplies Fully Differential Analog Input Wide Input Bandwidth: 70dB SINAD at 20kHz Input Frequency No Pipeline Delays Serial Interface - SPI TM /QSPI TM /MICROWIRE TM / DSP Compatible Automatic Power-Down Mode 8 Pin SOT-23 and µSOIC Package APPLICATIONS Transducer Interface Battery Powered Systems Data Acquisition Systems Portable Instrumentation Motor Control Communications Differential Input, 100kSPS, 12-Bit ADC in 8-lead SOT-23 AD7456 FUNCTIONAL BLOCK DIAGRAM VDD VIN+ VINVREF T/H 12-BIT SUCCESSIVE APPROXIMATION ADC SCLK AD7456 CONTROL LOGIC SDATA CS GND DataShee DataSheet4U.com GENERAL DESCRIPTION The AD7456 is a 12-bit, low power, successive-approximation (SAR) analog-to-digital converter that features a fully differential analog input. This part operates from a single 3 V or 5 V power supply and features throughput rates up to 100kSPS. The part contains a low-noise, wide bandwidth, differential track and hold amplifier (T/H) which can handle input frequencies in excess of 1MHz with the -3dB point being 20MHz typically. The reference voltage is applied externally to the VREF pin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. The value of the reference voltage determines the common mode voltage range of t...